670251860 has 24 divisors (see below), whose sum is σ = 1490325480. Its totient is φ = 252329984.

The previous prime is 670251821. The next prime is 670251863. The reversal of 670251860 is 68152076.

It can be written as a sum of positive squares in 4 ways, for example, as 120912016 + 549339844 = 10996^2 + 23438^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 670251860.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670251863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 985325 + ... + 986004.

It is an arithmetic number, because the mean of its divisors is an integer number (62096895).

Almost surely, 2^670251860 is an apocalyptic number.

It is an amenable number.

670251860 is an abundant number, since it is smaller than the sum of its proper divisors (820073620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

670251860 is a wasteful number, since it uses less digits than its factorization.

670251860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971355 (or 1971353 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 670251860 is about 25889.2228543075. Note that the first 3 decimals coincide. The cubic root of 670251860 is about 875.1436433564.

The spelling of 670251860 in words is "six hundred seventy million, two hundred fifty-one thousand, eight hundred sixty".